#include <unistd.h>

#include <errno.h>

#include <string.h>

#include <getopt.h>

#include <pwd.h>

#include <locale.h>

#include <socket.h>

#include <fcntl.h>

#include "sd-bus.h"

#include "log.h"

#include "util.h"

#include "macro.h"

#include "pager.h"

#include "bus-util.h"

#include "bus-error.h"

#include "build.h"

#include "strv.h"

#include "unit-name.h"

#include "cgroup-show.h"

#include "cgroup-util.h"

#include "ptyfwd.h"

static char **arg_property = NULL;

static bool arg_all = false;

static bool arg_full = false;

static bool arg_no_pager = false;

static const char *arg_kill_who = NULL;

static int arg_signal = SIGTERM;

static bool arg_ask_password = true;

static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;

static char *arg_host = NULL;

static void pager_open_if_enabled(void) {

/* Cache result before we open the pager */

if (arg_no_pager)

return;

pager_open(false);

}

static int list_machines(sd_bus *bus, char **args, unsigned n) {

_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;

_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;

const char *name, *class, *service, *object;

unsigned k = 0;

int r;

pager_open_if_enabled();

r = sd_bus_call_method(

bus,

"org.freedesktop.machine1",

"/org/freedesktop/machine1",

"org.freedesktop.machine1.Manager",

"ListMachines",

&error,

&reply,

"");

if (r < 0) {

log_error("Could not get machines: %s", bus_error_message(&error, -r));

return r;

}

if (on_tty())

printf("%-32s %-9s %-16s\n", "MACHINE", "CONTAINER", "SERVICE");

r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssso)");

if (r < 0)

goto fail;

while ((r = sd_bus_message_read(reply, "(ssso)", &name, &class, &service, &object)) > 0) {

printf("%-32s %-9s %-16s\n", name, class, service);

k++;

}

if (r < 0)

goto fail;

r = sd_bus_message_exit_container(reply);

if (r < 0)

goto fail;

if (on_tty())

printf("\n%u machines listed.\n", k);

return 0;

fail:

log_error("Failed to parse reply: %s", strerror(-r));

return r;

}

static int show_scope_cgroup(sd_bus *bus, const char *unit, pid_t leader) {

_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;

_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;

_cleanup_free_ char *path = NULL;

const char *cgroup;

int r, output_flags;

unsigned c;

assert(bus);

assert(unit);

if (arg_transport == BUS_TRANSPORT_REMOTE)

return 0;

path = unit_dbus_path_from_name(unit);

if (!path)

return log_oom();

r = sd_bus_get_property(

bus,

"org.freedesktop.systemd1",

path,

"org.freedesktop.systemd1.Scope",

"ControlGroup",

&error,

&reply,

"s");

if (r < 0) {

log_error("Failed to query ControlGroup: %s", bus_error_message(&error, -r));

return r;

}

r = sd_bus_message_read(reply, "s", &cgroup);

if (r < 0) {

log_error("Failed to parse reply: %s", strerror(-r));

return r;

}

if (isempty(cgroup))

return 0;

if (cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, cgroup, false) != 0 && leader <= 0)

return 0;

output_flags =

arg_all * OUTPUT_SHOW_ALL |

arg_full * OUTPUT_FULL_WIDTH;

c = columns();

if (c > 18)

c -= 18;

else

c = 0;

show_cgroup_and_extra(SYSTEMD_CGROUP_CONTROLLER, cgroup, "\t\t ", c, false, &leader, leader > 0, output_flags);

return 0;

}

typedef struct MachineStatusInfo {

char *name;

sd_id128_t id;

char *class;

char *service;

char *scope;

char *root_directory;

pid_t leader;

usec_t timestamp;

} MachineStatusInfo;

static void print_machine_status_info(sd_bus *bus, MachineStatusInfo *i) {

char since1[FORMAT_TIMESTAMP_RELATIVE_MAX], *s1;

char since2[FORMAT_TIMESTAMP_MAX], *s2;

assert(i);

fputs(strna(i->name), stdout);

if (!sd_id128_equal(i->id, SD_ID128_NULL))

printf("(" SD_ID128_FORMAT_STR ")\n", SD_ID128_FORMAT_VAL(i->id));

else

putchar('\n');

s1 = format_timestamp_relative(since1, sizeof(since1), i->timestamp);

s2 = format_timestamp(since2, sizeof(since2), i->timestamp);

if (s1)

printf("\t Since: %s; %s\n", s2, s1);

else if (s2)

printf("\t Since: %s\n", s2);

if (i->leader > 0) {

_cleanup_free_ char *t = NULL;

printf("\t Leader: %u", (unsigned) i->leader);

get_process_comm(i->leader, &t);

if (t)

printf(" (%s)", t);

putchar('\n');

}

if (i->service) {

printf("\t Service: %s", i->service);

if (i->class)

printf("; class %s", i->class);

putchar('\n');

} else if (i->class)

printf("\t Class: %s\n", i->class);

if (i->root_directory)

printf("\t Root: %s\n", i->root_directory);

if (i->scope) {

printf("\t Unit: %s\n", i->scope);

show_scope_cgroup(bus, i->scope, i->leader);

}

}

static int show_info(const char *verb, sd_bus *bus, const char *path, bool *new_line) {

MachineStatusInfo info = {};

static const struct bus_properties_map map[] = {

{ "Name", "s", NULL, offsetof(MachineStatusInfo, name) },

{ "Class", "s", NULL, offsetof(MachineStatusInfo, class) },

{ "Service", "s", NULL, offsetof(MachineStatusInfo, service) },

{ "Scope", "s", NULL, offsetof(MachineStatusInfo, scope) },

{ "RootDirectory", "s", NULL, offsetof(MachineStatusInfo, root_directory) },

{ "Leader", "u", NULL, offsetof(MachineStatusInfo, leader) },

{ "Timestamp", "t", NULL, offsetof(MachineStatusInfo, timestamp) },

{ "Id", "ay", bus_map_id128, offsetof(MachineStatusInfo, id) },

{}

};

int r;

assert(path);

assert(new_line);

r = bus_map_all_properties(bus,

"org.freedesktop.machine1",

path,

map,

&info);

if (r < 0) {

log_error("Could not get properties: %s", strerror(-r));

return r;

}

if (*new_line)

printf("\n");

*new_line = true;

print_machine_status_info(bus, &info);

free(info.name);

free(info.class);

free(info.service);

free(info.scope);

free(info.root_directory);

return r;

}

static int show_properties(sd_bus *bus, const char *path, bool *new_line) {

int r;

if (*new_line)

printf("\n");

*new_line = true;

r = bus_print_all_properties(bus, path, arg_property, arg_all);

if (r < 0)

log_error("Could not get properties: %s", strerror(-r));

return r;

}

static int show(sd_bus *bus, char **args, unsigned n) {

_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;

_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;

int r = 0;

unsigned i;

bool properties, new_line = false;

assert(bus);

assert(args);

properties = !strstr(args[0], "status");

pager_open_if_enabled();

if (properties && n <= 1) {

/* If no argument is specified, inspect the manager

r = show_properties(bus, "/org/freedesktop/machine1", &new_line);

if (r < 0) {

log_error("Failed to query properties: %s", strerror(-r));

return r;

}

}

for (i = 1; i < n; i++) {

const char *path = NULL;

r = sd_bus_call_method(

bus,

"org.freedesktop.machine1",

"/org/freedesktop/machine1",

"org.freedesktop.machine1.Manager",

"GetMachine",

&error,

&reply,

"s", args[i]);

if (r < 0) {

log_error("Could not get path to machine: %s", bus_error_message(&error, -r));

return r;

}

r = sd_bus_message_read(reply, "o", &path);

if (r < 0) {

log_error("Failed to parse reply: %s", strerror(-r));

break;

}

if (properties)

r = show_properties(bus, path, &new_line);

else

r = show_info(args[0], bus, path, &new_line);

}

return r;

}

static int kill_machine(sd_bus *bus, char **args, unsigned n) {

_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;

unsigned i;

assert(args);

if (!arg_kill_who)

arg_kill_who = "all";

for (i = 1; i < n; i++) {

int r;

r = sd_bus_call_method(

bus,

"org.freedesktop.machine1",

"/org/freedesktop/machine1",

"org.freedesktop.machine1.Manager",

"KillMachine",

&error,

NULL,

"ssi", args[i], arg_kill_who, arg_signal);

if (r < 0) {

log_error("Could not kill machine: %s", bus_error_message(&error, -r));

return r;

}

}

return 0;

}

static int terminate_machine(sd_bus *bus, char **args, unsigned n) {

_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;

unsigned i;

assert(args);

for (i = 1; i < n; i++) {

int r;

r = sd_bus_call_method(

bus,

"org.freedesktop.machine1",

"/org/freedesktop/machine1",

"org.freedesktop.machine1.Manager",

"TerminateMachine",

&error,

NULL,

"s", args[i]);

if (r < 0) {

log_error("Could not terminate machine: %s", bus_error_message(&error, -r));

return r;

}

}

return 0;

}

static int openpt_in_namespace(pid_t pid, int flags) {

_cleanup_close_ int nsfd = -1, rootfd = -1;

_cleanup_free_ char *ns = NULL, *root = NULL;

_cleanup_close_pipe_ int sock[2] = { -1, -1 };

struct msghdr mh;

union {

struct cmsghdr cmsghdr;

uint8_t buf[CMSG_SPACE(sizeof(int))];

} control;

struct cmsghdr *cmsg;

int master = -1, r;

pid_t child;

siginfo_t si;

r = asprintf(&ns, "/proc/%lu/ns/mnt", (unsigned long) pid);

if (r < 0)

return -ENOMEM;

nsfd = open(ns, O_RDONLY|O_NOCTTY|O_CLOEXEC);

if (nsfd < 0)

return -errno;

r = asprintf(&root, "/proc/%lu/root", (unsigned long) pid);

if (r < 0)

return -ENOMEM;

rootfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);

if (rootfd < 0)

return -errno;

if (socketpair(AF_UNIX, SOCK_DGRAM, 0, sock) < 0)

return -errno;

zero(control);

zero(mh);

mh.msg_control = &control;

mh.msg_controllen = sizeof(control);

child = fork();

if (child < 0)

return -errno;

if (child == 0) {

close_nointr_nofail(sock[0]);

sock[0] = -1;

r = setns(nsfd, CLONE_NEWNS);

if (r < 0)

_exit(EXIT_FAILURE);

if (fchdir(rootfd) < 0)

_exit(EXIT_FAILURE);

if (chroot(".") < 0)

_exit(EXIT_FAILURE);

master = posix_openpt(flags);

if (master < 0)

_exit(EXIT_FAILURE);

cmsg = CMSG_FIRSTHDR(&mh);

cmsg->cmsg_level = SOL_SOCKET;

cmsg->cmsg_type = SCM_RIGHTS;

cmsg->cmsg_len = CMSG_LEN(sizeof(int));

memcpy(CMSG_DATA(cmsg), &master, sizeof(int));

mh.msg_controllen = cmsg->cmsg_len;

r = sendmsg(sock[1], &mh, MSG_NOSIGNAL);

close_nointr_nofail(master);

if (r < 0)

_exit(EXIT_FAILURE);

_exit(EXIT_SUCCESS);

}

close_nointr_nofail(sock[1]);

sock[1] = -1;

if (recvmsg(sock[0], &mh, MSG_NOSIGNAL|MSG_CMSG_CLOEXEC) < 0)

return -errno;

for (cmsg = CMSG_FIRSTHDR(&mh); cmsg; cmsg = CMSG_NXTHDR(&mh, cmsg))

if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) {

int *fds;

unsigned n_fds;

fds = (int*) CMSG_DATA(cmsg);

n_fds = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);

if (n_fds != 1) {

close_many(fds, n_fds);

return -EIO;

}

master = fds[0];

}

r = wait_for_terminate(child, &si);

if (r < 0 || si.si_code != CLD_EXITED || si.si_status != EXIT_SUCCESS || master < 0) {

if (master >= 0)

close_nointr_nofail(master);

return r < 0 ? r : -EIO;

}

return master;

}

static int login_machine(sd_bus *bus, char **args, unsigned n) {

_cleanup_bus_message_unref_ sd_bus_message *reply = NULL, *reply2 = NULL, *reply3 = NULL;

_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;

_cleanup_bus_unref_ sd_bus *container_bus = NULL;

_cleanup_close_ int master = -1;

_cleanup_free_ char *getty = NULL;

const char *path, *pty, *p;

uint32_t leader;

sigset_t mask;

int r;

assert(bus);

assert(args);

if (arg_transport != BUS_TRANSPORT_LOCAL) {

log_error("Login only support on local machines.");

return -ENOTSUP;

}

r = sd_bus_call_method(

bus,

"org.freedesktop.machine1",

"/org/freedesktop/machine1",

"org.freedesktop.machine1.Manager",

"GetMachine",

&error,

&reply,

"s", args[1]);

if (r < 0) {

log_error("Could not get path to machine: %s", bus_error_message(&error, -r));

return r;

}

r = sd_bus_message_read(reply, "o", &path);

if (r < 0) {

log_error("Failed to parse reply: %s", strerror(-r));

return r;

}

r = sd_bus_get_property(

bus,

"org.freedesktop.machine1",

path,

"org.freedesktop.machine1.Machine",

"Leader",

&error,

&reply2,

"u");

if (r < 0) {

log_error("Failed to retrieve PID of leader: %s", strerror(-r));

return r;

}

r = sd_bus_message_read(reply2, "u", &leader);

if (r < 0) {

log_error("Failed to parse reply: %s", strerror(-r));

return r;

}

master = openpt_in_namespace(leader, O_RDWR|O_NOCTTY|O_CLOEXEC|O_NDELAY);

if (master < 0) {

log_error("Failed to acquire pseudo tty: %s", strerror(-master));

return master;

}

pty = ptsname(master);

if (!pty) {

log_error("Failed to get pty name: %m");

return -errno;

}

p = startswith(pty, "/dev/pts/");

if (!p) {

log_error("Invalid pty name %s.", pty);

return -EIO;

}

r = sd_bus_open_system_container(args[1], &container_bus);

if (r < 0) {

log_error("Failed to get container bus: %s", strerror(-r));

return r;

}

getty = strjoin("container-getty@", p, ".service", NULL);

if (!getty)

return log_oom();

if (unlockpt(master) < 0) {

log_error("Failed to unlock tty: %m");

return -errno;

}

r = sd_bus_call_method(container_bus,

"org.freedesktop.systemd1",

"/org/freedesktop/systemd1",

"org.freedesktop.systemd1.Manager",

"StartUnit",

&error, &reply3,

"ss", getty, "replace");

if (r < 0) {

log_error("Failed to start getty service: %s", bus_error_message(&error, r));

return r;

}

assert_se(sigemptyset(&mask) == 0);

sigset_add_many(&mask, SIGWINCH, SIGTERM, SIGINT, -1);

assert_se(sigprocmask(SIG_BLOCK, &mask, NULL) == 0);

log_info("Connected to container %s. Press ^] three times within 1s to exit session.", args[1]);

r = process_pty(master, &mask, 0, 0);

if (r < 0) {

log_error("Failed to process pseudo tty: %s", strerror(-r));

return r;

}

fputc('\n', stdout);

log_info("Connection to container %s terminated.", args[1]);

return 0;

}

static int help(void) {

printf("%s [OPTIONS...] {COMMAND} ...\n\n"

"Send control commands to or query the virtual machine and container registration manager.\n\n"

" -h --help Show this help\n"

" --version Show package version\n"

" --no-pager Do not pipe output into a pager\n"

" --no-ask-password Don't prompt for password\n"

" -H --host=[USER@]HOST Operate on remote host\n"

" -M --machine=CONTAINER Operate on local container\n"

" -p --property=NAME Show only properties by this name\n"

" -a --all Show all properties, including empty ones\n"

" -l --full Do not ellipsize output\n"

" --kill-who=WHO Who to send signal to\n"

" -s --signal=SIGNAL Which signal to send\n\n"

"Commands:\n"

" list List running VMs and containers\n"

" status [NAME...] Show VM/container status\n"

" show [NAME...] Show properties of one or more VMs/containers\n"

" terminate [NAME...] Terminate one or more VMs/containers\n"

" kill [NAME...] Send signal to processes of a VM/container\n"

" login [NAME] Get a login prompt on a container\n",

program_invocation_short_name);

return 0;

}

static int parse_argv(int argc, char *argv[]) {

enum {

ARG_VERSION = 0x100,

ARG_NO_PAGER,

ARG_KILL_WHO,

ARG_NO_ASK_PASSWORD,

};

static const struct option options[] = {

{ "help", no_argument, NULL, 'h' },

{ "version", no_argument, NULL, ARG_VERSION },

{ "property", required_argument, NULL, 'p' },

{ "all", no_argument, NULL, 'a' },

{ "full", no_argument, NULL, 'l' },

{ "no-pager", no_argument, NULL, ARG_NO_PAGER },

{ "kill-who", required_argument, NULL, ARG_KILL_WHO },

{ "signal", required_argument, NULL, 's' },

{ "host", required_argument, NULL, 'H' },

{ "machine", required_argument, NULL, 'M' },

{ "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },

{ NULL, 0, NULL, 0 }

};

int c, r;

assert(argc >= 0);

assert(argv);

while ((c = getopt_long(argc, argv, "hp:als:H:M:", options, NULL)) >= 0) {

switch (c) {

case 'h':

help();

return 0;

case ARG_VERSION:

puts(PACKAGE_STRING);

puts(SYSTEMD_FEATURES);

return 0;

case 'p':

r = strv_extend(&arg_property, optarg);

if (r < 0)

return log_oom();

/* If the user asked for a particular

arg_all = true;

break;

case 'a':

arg_all = true;

break;

case 'l':

arg_full = true;

break;

case ARG_NO_PAGER:

arg_no_pager = true;

break;

case ARG_NO_ASK_PASSWORD:

arg_ask_password = false;

break;

case ARG_KILL_WHO:

arg_kill_who = optarg;

break;

case 's':

arg_signal = signal_from_string_try_harder(optarg);

if (arg_signal < 0) {

log_error("Failed to parse signal string %s.", optarg);

return -EINVAL;

}

break;

case 'H':

arg_transport = BUS_TRANSPORT_REMOTE;

arg_host = optarg;

break;

case 'M':

arg_transport = BUS_TRANSPORT_CONTAINER;

arg_host = optarg;

break;

case '?':

return -EINVAL;

default:

log_error("Unknown option code %c", c);

return -EINVAL;

}

}

return 1;

}

static int machinectl_main(sd_bus *bus, int argc, char *argv[]) {

static const struct {

const char* verb;

const enum {

MORE,

LESS,

EQUAL

} argc_cmp;

const int argc;

int (* const dispatch)(sd_bus *bus, char **args, unsigned n);

} verbs[] = {

{ "list", LESS, 1, list_machines },

{ "status", MORE, 2, show },

{ "show", MORE, 1, show },

{ "terminate", MORE, 2, terminate_machine },

{ "kill", MORE, 2, kill_machine },

{ "login", MORE, 2, login_machine },

};

int left;

unsigned i;

assert(argc >= 0);

assert(argv);

left = argc - optind;

if (left <= 0)

/* Special rule: no arguments means "list-sessions" */

i = 0;

else {

if (streq(argv[optind], "help")) {

help();

return 0;

}

for (i = 0; i < ELEMENTSOF(verbs); i++)

if (streq(argv[optind], verbs[i].verb))

break;

if (i >= ELEMENTSOF(verbs)) {

log_error("Unknown operation %s", argv[optind]);

return -EINVAL;

}

}

switch (verbs[i].argc_cmp) {

case EQUAL:

if (left != verbs[i].argc) {

log_error("Invalid number of arguments.");

return -EINVAL;

}

break;

case MORE:

if (left < verbs[i].argc) {

log_error("Too few arguments.");

return -EINVAL;

}

break;

case LESS:

if (left > verbs[i].argc) {

log_error("Too many arguments.");

return -EINVAL;

}

break;

default:

assert_not_reached("Unknown comparison operator.");

}

return verbs[i].dispatch(bus, argv + optind, left);

}

int main(int argc, char*argv[]) {

int r, ret = EXIT_FAILURE;

_cleanup_bus_unref_ sd_bus *bus = NULL;

setlocale(LC_ALL, "");

log_parse_environment();

log_open();

r = parse_argv(argc, argv);

if (r < 0)

goto finish;

else if (r == 0) {

ret = EXIT_SUCCESS;

goto finish;

}

r = bus_open_transport(arg_transport, arg_host, false, &bus);

if (r < 0) {

log_error("Failed to create bus connection: %s", strerror(-r));

ret = EXIT_FAILURE;

goto finish;

}

r = machinectl_main(bus, argc, argv);

ret = r < 0 ? EXIT_FAILURE : r;

finish:

strv_free(arg_property);

pager_close();

return ret;

}